I have a situation were I need to evaluate the heat transfer coefficient of a horizontal surface. The surface has tubes within although I first used "flow across a bank of tubes", this has been untrue due to the air flow coming from above the surface flowing vertically (and...
A shaft 2 m long rotates at 1500 revs min–1 between bearings as
shown in FIGURE 2. The bearings experience forces of 5 kN and
3 kN acting in the same plane as shown. A single mass is to be used
to balance the shaft, so that the reactions are zero. The mass is to be
If the flue gases exiting the boiler are used to preheat the water fed to the boiler from a temperature of 28 C to 90 C and assuming:
• a mean specific heat capacity for water over this temperature range to be 4.2 kJ kg–1 K–1
a mean molar heat capacity for the flue...
C4H10 + 4.5O2 -> 4Co2 + 5H2O1. Homework Statement
A fuel gas consists of 75% butane (C4 H10 ), 10% propane (C3 H8 ) and butene (C4 H8 ) by volume.
It is to be fed to the combustion chamber in 10% excess air at 25ºwhere it is completely burnt to carbon dioxide and water. The flue gases...
Dry saturated steam at a temperature of 180oC is to be produced in a fire tube boiler from the cooling of 50 000 kg h–1 of flue gases from a pressurised combustion process. The gases enter the tubes of the boiler at 1600oC and leave at 200oC. The feed water is externally...
I have tried to search through various books including perrys
Can anyone state the net calorific value (lower heating value) for butene C4H8 and the source if possible
It would be much appreciated
Process water with a specific heat capacity of 4.182 kJ kg–1 K–1 flows at a rate of 0.050 kg s–1 through a heat exchanger where its temperature is increased from 16°C to 85°C. Heat is supplied by exhaust gases (mean specific heat capacity 1.075 kJ kg–1 K–1) which enter the...
Hi am a bit stuck on understanding how these two correlations can be similar I am wondering if anyone can ahead any light
Can anyone solve
Correlation for heat transfer by natural convection from a horizontal pipe to atmosphere is;
Nu = 0.53Gr^0.25Pr^0.25
Nu = hd / k
Where, Gr =...